*{
    margin: 0;
    padding: 0;
}
.container{
    width: 100vw;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    .header{
        height: 50px;
        background-color: skyblue;
        display: flex;
        justify-content: space-around;
        align-items: center;
    }
    .main{
        flex-grow: 1;
    }
}